摘要
基于野外实地调查的86块样地的710株上海市水杉树高和胸径的资料,利用回归分析的方法,研究了水杉树高和胸径的相关关系.结果表明:胸径20 cm以下、20 cm以上和所有胸径范围的水杉树高(y)与胸径(x)关系模式分别为:y=1.15x0.75,y=y=-0.019x2+1.481x-10.63,y=-0.03x2+0.62x-0.42.回归方程均达到了极显著的水平(p<0.01).有助于对上海市水杉的胸径估计树高的研究,及水杉林的资源调查和人工林的管理.
According to the inventory data of height （y） and diameter at breast height （DBH x） of 710 Metasequoia glyptostroboides trees from 86 plots in Shanghai, correlations between height and DBH of Metasequoia glyptostroboides were studied. The results showed that there existed significant correlations between height and DBH. The relationships were： y = 1.15x^0.751 （if DBH 〈 20cm）,y = -0.019x^2 ＋1.481x-10.63（if DBH 〉20cm） andy = -0.03x^2 ＋0.62x-0.42（for all trees）. All those relationships passed through the significant test ofp 〈 0. 01. This study may be helpful to the inventory and management of Metasequoia glyptostroboides forest plantation.
出处
《上海师范大学学报（自然科学版）》
2009年第5期531-535,共5页
Journal of Shanghai Normal University(Natural Sciences)
基金
上海市教委重点学科项目(J50402)
上海市908海岛植被调查项目
上海师范大学科研项目(SK200849)
关键词
树高
胸径
相关关系
水杉
height
diameter at breast height
correlation analysis
Metasequoia glyptostroboides
